Desa 000) 20 Owner's Manual

Contents

16102748Pump Rotor(Procedure if rotor is binding)1. Remove upper shell (seepage 10).2. Remove filter end coverscrews using 5/16" nut-driver.3. Remove filter end coverand air filters.4. Remove pump platescrews using 5/16" nut-driver.5. Remove pump plate.6. Remove rotor, insert, andblades.7. Check for debris in pump.If debris is found, blowout with compressed air.8. Install insert and rotor.9. Check gap on rotor.Adjust to .003"/.004"(.076/.101 mm) if needed(see Figure 27).Note: Rotate rotor onefull turn to insure the gap is.003"/.004" (.076/.101 mm) attightest position. Adjust ifneeded.10. Install blades, pump plate,air filters, and filter endcover.11. Replace fan guard andupper shell.12. Adjust pump pressure (seepage 13).Note: If rotor is still binding,proceed as follows.13. Perform steps 1 thru 6above.14. Place fine grade sandpaper(600 grit) on flat surface.Sand rotor lightly in“figure 8” motion fourtimes (see Figure 28).15. Reinstall insert and rotor.16. Perform steps 10 thru 12above.Figure 25 - Rotor Location, 8,8/20,5 kW (30/70,000 Btu/Hr) Models.003"/.004"(.076/.101 mm) GapMeasured WithFeeler GaugeFigure 26 - Rotor Location, 26,4/44 kW (90/150,000 Btu/Hr) ModelsInsertBladeRotorPumpPlateFilter EndCoverAirIntakeFilterAirOutputFilterPumpPlateInsert RotorBladeFilter EndCoverAirIntakeFilterAir OutputFilterFan GuardFan GuardGap AdjustingScrewRotorGapAdjustingScrewBladeSandpaperFigure 27 - Gap AdjustingScrew LocationsFigure 28 - Sanding Rotor